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ccb1352e | 1 | /* |
971427f3 | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
ccb1352e JG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
20 | ||
21 | #include <linux/skbuff.h> | |
22 | #include <linux/in.h> | |
23 | #include <linux/ip.h> | |
24 | #include <linux/openvswitch.h> | |
a175a723 | 25 | #include <linux/sctp.h> |
ccb1352e JG |
26 | #include <linux/tcp.h> |
27 | #include <linux/udp.h> | |
28 | #include <linux/in6.h> | |
29 | #include <linux/if_arp.h> | |
30 | #include <linux/if_vlan.h> | |
25cd9ba0 | 31 | |
ccb1352e | 32 | #include <net/ip.h> |
3fdbd1ce | 33 | #include <net/ipv6.h> |
ccb1352e JG |
34 | #include <net/checksum.h> |
35 | #include <net/dsfield.h> | |
25cd9ba0 | 36 | #include <net/mpls.h> |
a175a723 | 37 | #include <net/sctp/checksum.h> |
ccb1352e JG |
38 | |
39 | #include "datapath.h" | |
971427f3 | 40 | #include "flow.h" |
ccb1352e JG |
41 | #include "vport.h" |
42 | ||
43 | static int do_execute_actions(struct datapath *dp, struct sk_buff *skb, | |
2ff3e4e4 | 44 | struct sw_flow_key *key, |
651887b0 | 45 | const struct nlattr *attr, int len); |
ccb1352e | 46 | |
971427f3 AZ |
47 | struct deferred_action { |
48 | struct sk_buff *skb; | |
49 | const struct nlattr *actions; | |
50 | ||
51 | /* Store pkt_key clone when creating deferred action. */ | |
52 | struct sw_flow_key pkt_key; | |
53 | }; | |
54 | ||
55 | #define DEFERRED_ACTION_FIFO_SIZE 10 | |
56 | struct action_fifo { | |
57 | int head; | |
58 | int tail; | |
59 | /* Deferred action fifo queue storage. */ | |
60 | struct deferred_action fifo[DEFERRED_ACTION_FIFO_SIZE]; | |
61 | }; | |
62 | ||
63 | static struct action_fifo __percpu *action_fifos; | |
64 | static DEFINE_PER_CPU(int, exec_actions_level); | |
65 | ||
66 | static void action_fifo_init(struct action_fifo *fifo) | |
67 | { | |
68 | fifo->head = 0; | |
69 | fifo->tail = 0; | |
70 | } | |
71 | ||
12eb18f7 | 72 | static bool action_fifo_is_empty(const struct action_fifo *fifo) |
971427f3 AZ |
73 | { |
74 | return (fifo->head == fifo->tail); | |
75 | } | |
76 | ||
77 | static struct deferred_action *action_fifo_get(struct action_fifo *fifo) | |
78 | { | |
79 | if (action_fifo_is_empty(fifo)) | |
80 | return NULL; | |
81 | ||
82 | return &fifo->fifo[fifo->tail++]; | |
83 | } | |
84 | ||
85 | static struct deferred_action *action_fifo_put(struct action_fifo *fifo) | |
86 | { | |
87 | if (fifo->head >= DEFERRED_ACTION_FIFO_SIZE - 1) | |
88 | return NULL; | |
89 | ||
90 | return &fifo->fifo[fifo->head++]; | |
91 | } | |
92 | ||
93 | /* Return true if fifo is not full */ | |
94 | static struct deferred_action *add_deferred_actions(struct sk_buff *skb, | |
12eb18f7 | 95 | const struct sw_flow_key *key, |
971427f3 AZ |
96 | const struct nlattr *attr) |
97 | { | |
98 | struct action_fifo *fifo; | |
99 | struct deferred_action *da; | |
100 | ||
101 | fifo = this_cpu_ptr(action_fifos); | |
102 | da = action_fifo_put(fifo); | |
103 | if (da) { | |
104 | da->skb = skb; | |
105 | da->actions = attr; | |
106 | da->pkt_key = *key; | |
107 | } | |
108 | ||
109 | return da; | |
110 | } | |
111 | ||
fff06c36 PS |
112 | static void invalidate_flow_key(struct sw_flow_key *key) |
113 | { | |
114 | key->eth.type = htons(0); | |
115 | } | |
116 | ||
117 | static bool is_flow_key_valid(const struct sw_flow_key *key) | |
118 | { | |
119 | return !!key->eth.type; | |
120 | } | |
121 | ||
fff06c36 | 122 | static int push_mpls(struct sk_buff *skb, struct sw_flow_key *key, |
25cd9ba0 SH |
123 | const struct ovs_action_push_mpls *mpls) |
124 | { | |
125 | __be32 *new_mpls_lse; | |
126 | struct ethhdr *hdr; | |
127 | ||
128 | /* Networking stack do not allow simultaneous Tunnel and MPLS GSO. */ | |
129 | if (skb->encapsulation) | |
130 | return -ENOTSUPP; | |
131 | ||
132 | if (skb_cow_head(skb, MPLS_HLEN) < 0) | |
133 | return -ENOMEM; | |
134 | ||
135 | skb_push(skb, MPLS_HLEN); | |
136 | memmove(skb_mac_header(skb) - MPLS_HLEN, skb_mac_header(skb), | |
137 | skb->mac_len); | |
138 | skb_reset_mac_header(skb); | |
139 | ||
140 | new_mpls_lse = (__be32 *)skb_mpls_header(skb); | |
141 | *new_mpls_lse = mpls->mpls_lse; | |
142 | ||
143 | if (skb->ip_summed == CHECKSUM_COMPLETE) | |
144 | skb->csum = csum_add(skb->csum, csum_partial(new_mpls_lse, | |
145 | MPLS_HLEN, 0)); | |
146 | ||
147 | hdr = eth_hdr(skb); | |
148 | hdr->h_proto = mpls->mpls_ethertype; | |
149 | ||
cbe7e76d PS |
150 | if (!skb->inner_protocol) |
151 | skb_set_inner_protocol(skb, skb->protocol); | |
25cd9ba0 SH |
152 | skb->protocol = mpls->mpls_ethertype; |
153 | ||
fff06c36 | 154 | invalidate_flow_key(key); |
25cd9ba0 SH |
155 | return 0; |
156 | } | |
157 | ||
fff06c36 PS |
158 | static int pop_mpls(struct sk_buff *skb, struct sw_flow_key *key, |
159 | const __be16 ethertype) | |
25cd9ba0 SH |
160 | { |
161 | struct ethhdr *hdr; | |
162 | int err; | |
163 | ||
e2195121 | 164 | err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN); |
25cd9ba0 SH |
165 | if (unlikely(err)) |
166 | return err; | |
167 | ||
1abcd82c | 168 | skb_postpull_rcsum(skb, skb_mpls_header(skb), MPLS_HLEN); |
25cd9ba0 SH |
169 | |
170 | memmove(skb_mac_header(skb) + MPLS_HLEN, skb_mac_header(skb), | |
171 | skb->mac_len); | |
172 | ||
173 | __skb_pull(skb, MPLS_HLEN); | |
174 | skb_reset_mac_header(skb); | |
175 | ||
176 | /* skb_mpls_header() is used to locate the ethertype | |
177 | * field correctly in the presence of VLAN tags. | |
178 | */ | |
179 | hdr = (struct ethhdr *)(skb_mpls_header(skb) - ETH_HLEN); | |
180 | hdr->h_proto = ethertype; | |
181 | if (eth_p_mpls(skb->protocol)) | |
182 | skb->protocol = ethertype; | |
fff06c36 PS |
183 | |
184 | invalidate_flow_key(key); | |
25cd9ba0 SH |
185 | return 0; |
186 | } | |
187 | ||
83d2b9ba JR |
188 | /* 'KEY' must not have any bits set outside of the 'MASK' */ |
189 | #define MASKED(OLD, KEY, MASK) ((KEY) | ((OLD) & ~(MASK))) | |
190 | #define SET_MASKED(OLD, KEY, MASK) ((OLD) = MASKED(OLD, KEY, MASK)) | |
191 | ||
192 | static int set_mpls(struct sk_buff *skb, struct sw_flow_key *flow_key, | |
193 | const __be32 *mpls_lse, const __be32 *mask) | |
25cd9ba0 SH |
194 | { |
195 | __be32 *stack; | |
83d2b9ba | 196 | __be32 lse; |
25cd9ba0 SH |
197 | int err; |
198 | ||
e2195121 | 199 | err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN); |
25cd9ba0 SH |
200 | if (unlikely(err)) |
201 | return err; | |
202 | ||
203 | stack = (__be32 *)skb_mpls_header(skb); | |
83d2b9ba | 204 | lse = MASKED(*stack, *mpls_lse, *mask); |
25cd9ba0 | 205 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
83d2b9ba JR |
206 | __be32 diff[] = { ~(*stack), lse }; |
207 | ||
25cd9ba0 SH |
208 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), |
209 | ~skb->csum); | |
210 | } | |
211 | ||
83d2b9ba JR |
212 | *stack = lse; |
213 | flow_key->mpls.top_lse = lse; | |
25cd9ba0 SH |
214 | return 0; |
215 | } | |
216 | ||
fff06c36 | 217 | static int pop_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 218 | { |
ccb1352e JG |
219 | int err; |
220 | ||
93515d53 | 221 | err = skb_vlan_pop(skb); |
df8a39de | 222 | if (skb_vlan_tag_present(skb)) |
93515d53 JP |
223 | invalidate_flow_key(key); |
224 | else | |
fff06c36 | 225 | key->eth.tci = 0; |
93515d53 | 226 | return err; |
ccb1352e JG |
227 | } |
228 | ||
fff06c36 PS |
229 | static int push_vlan(struct sk_buff *skb, struct sw_flow_key *key, |
230 | const struct ovs_action_push_vlan *vlan) | |
ccb1352e | 231 | { |
df8a39de | 232 | if (skb_vlan_tag_present(skb)) |
fff06c36 | 233 | invalidate_flow_key(key); |
93515d53 | 234 | else |
fff06c36 | 235 | key->eth.tci = vlan->vlan_tci; |
93515d53 JP |
236 | return skb_vlan_push(skb, vlan->vlan_tpid, |
237 | ntohs(vlan->vlan_tci) & ~VLAN_TAG_PRESENT); | |
ccb1352e JG |
238 | } |
239 | ||
83d2b9ba JR |
240 | /* 'src' is already properly masked. */ |
241 | static void ether_addr_copy_masked(u8 *dst_, const u8 *src_, const u8 *mask_) | |
242 | { | |
243 | u16 *dst = (u16 *)dst_; | |
244 | const u16 *src = (const u16 *)src_; | |
245 | const u16 *mask = (const u16 *)mask_; | |
246 | ||
247 | SET_MASKED(dst[0], src[0], mask[0]); | |
248 | SET_MASKED(dst[1], src[1], mask[1]); | |
249 | SET_MASKED(dst[2], src[2], mask[2]); | |
250 | } | |
251 | ||
252 | static int set_eth_addr(struct sk_buff *skb, struct sw_flow_key *flow_key, | |
253 | const struct ovs_key_ethernet *key, | |
254 | const struct ovs_key_ethernet *mask) | |
ccb1352e JG |
255 | { |
256 | int err; | |
83d2b9ba | 257 | |
e2195121 | 258 | err = skb_ensure_writable(skb, ETH_HLEN); |
ccb1352e JG |
259 | if (unlikely(err)) |
260 | return err; | |
261 | ||
b34df5e8 PS |
262 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2); |
263 | ||
83d2b9ba JR |
264 | ether_addr_copy_masked(eth_hdr(skb)->h_source, key->eth_src, |
265 | mask->eth_src); | |
266 | ether_addr_copy_masked(eth_hdr(skb)->h_dest, key->eth_dst, | |
267 | mask->eth_dst); | |
ccb1352e | 268 | |
b34df5e8 PS |
269 | ovs_skb_postpush_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2); |
270 | ||
83d2b9ba JR |
271 | ether_addr_copy(flow_key->eth.src, eth_hdr(skb)->h_source); |
272 | ether_addr_copy(flow_key->eth.dst, eth_hdr(skb)->h_dest); | |
ccb1352e JG |
273 | return 0; |
274 | } | |
275 | ||
3576fd79 GG |
276 | static void update_ip_l4_checksum(struct sk_buff *skb, struct iphdr *nh, |
277 | __be32 addr, __be32 new_addr) | |
ccb1352e JG |
278 | { |
279 | int transport_len = skb->len - skb_transport_offset(skb); | |
280 | ||
3576fd79 GG |
281 | if (nh->frag_off & htons(IP_OFFSET)) |
282 | return; | |
283 | ||
ccb1352e JG |
284 | if (nh->protocol == IPPROTO_TCP) { |
285 | if (likely(transport_len >= sizeof(struct tcphdr))) | |
286 | inet_proto_csum_replace4(&tcp_hdr(skb)->check, skb, | |
4b048d6d | 287 | addr, new_addr, true); |
ccb1352e | 288 | } else if (nh->protocol == IPPROTO_UDP) { |
81e5d41d JG |
289 | if (likely(transport_len >= sizeof(struct udphdr))) { |
290 | struct udphdr *uh = udp_hdr(skb); | |
291 | ||
292 | if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) { | |
293 | inet_proto_csum_replace4(&uh->check, skb, | |
4b048d6d | 294 | addr, new_addr, true); |
81e5d41d JG |
295 | if (!uh->check) |
296 | uh->check = CSUM_MANGLED_0; | |
297 | } | |
298 | } | |
ccb1352e | 299 | } |
3576fd79 | 300 | } |
ccb1352e | 301 | |
3576fd79 GG |
302 | static void set_ip_addr(struct sk_buff *skb, struct iphdr *nh, |
303 | __be32 *addr, __be32 new_addr) | |
304 | { | |
305 | update_ip_l4_checksum(skb, nh, *addr, new_addr); | |
ccb1352e | 306 | csum_replace4(&nh->check, *addr, new_addr); |
7539fadc | 307 | skb_clear_hash(skb); |
ccb1352e JG |
308 | *addr = new_addr; |
309 | } | |
310 | ||
3fdbd1ce AA |
311 | static void update_ipv6_checksum(struct sk_buff *skb, u8 l4_proto, |
312 | __be32 addr[4], const __be32 new_addr[4]) | |
313 | { | |
314 | int transport_len = skb->len - skb_transport_offset(skb); | |
315 | ||
856447d0 | 316 | if (l4_proto == NEXTHDR_TCP) { |
3fdbd1ce AA |
317 | if (likely(transport_len >= sizeof(struct tcphdr))) |
318 | inet_proto_csum_replace16(&tcp_hdr(skb)->check, skb, | |
4b048d6d | 319 | addr, new_addr, true); |
856447d0 | 320 | } else if (l4_proto == NEXTHDR_UDP) { |
3fdbd1ce AA |
321 | if (likely(transport_len >= sizeof(struct udphdr))) { |
322 | struct udphdr *uh = udp_hdr(skb); | |
323 | ||
324 | if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) { | |
325 | inet_proto_csum_replace16(&uh->check, skb, | |
4b048d6d | 326 | addr, new_addr, true); |
3fdbd1ce AA |
327 | if (!uh->check) |
328 | uh->check = CSUM_MANGLED_0; | |
329 | } | |
330 | } | |
856447d0 JG |
331 | } else if (l4_proto == NEXTHDR_ICMP) { |
332 | if (likely(transport_len >= sizeof(struct icmp6hdr))) | |
333 | inet_proto_csum_replace16(&icmp6_hdr(skb)->icmp6_cksum, | |
4b048d6d | 334 | skb, addr, new_addr, true); |
3fdbd1ce AA |
335 | } |
336 | } | |
337 | ||
83d2b9ba JR |
338 | static void mask_ipv6_addr(const __be32 old[4], const __be32 addr[4], |
339 | const __be32 mask[4], __be32 masked[4]) | |
340 | { | |
341 | masked[0] = MASKED(old[0], addr[0], mask[0]); | |
342 | masked[1] = MASKED(old[1], addr[1], mask[1]); | |
343 | masked[2] = MASKED(old[2], addr[2], mask[2]); | |
344 | masked[3] = MASKED(old[3], addr[3], mask[3]); | |
345 | } | |
346 | ||
3fdbd1ce AA |
347 | static void set_ipv6_addr(struct sk_buff *skb, u8 l4_proto, |
348 | __be32 addr[4], const __be32 new_addr[4], | |
349 | bool recalculate_csum) | |
350 | { | |
351 | if (recalculate_csum) | |
352 | update_ipv6_checksum(skb, l4_proto, addr, new_addr); | |
353 | ||
7539fadc | 354 | skb_clear_hash(skb); |
3fdbd1ce AA |
355 | memcpy(addr, new_addr, sizeof(__be32[4])); |
356 | } | |
357 | ||
83d2b9ba | 358 | static void set_ipv6_fl(struct ipv6hdr *nh, u32 fl, u32 mask) |
3fdbd1ce | 359 | { |
83d2b9ba JR |
360 | /* Bits 21-24 are always unmasked, so this retains their values. */ |
361 | SET_MASKED(nh->flow_lbl[0], (u8)(fl >> 16), (u8)(mask >> 16)); | |
362 | SET_MASKED(nh->flow_lbl[1], (u8)(fl >> 8), (u8)(mask >> 8)); | |
363 | SET_MASKED(nh->flow_lbl[2], (u8)fl, (u8)mask); | |
3fdbd1ce AA |
364 | } |
365 | ||
83d2b9ba JR |
366 | static void set_ip_ttl(struct sk_buff *skb, struct iphdr *nh, u8 new_ttl, |
367 | u8 mask) | |
3fdbd1ce | 368 | { |
83d2b9ba | 369 | new_ttl = MASKED(nh->ttl, new_ttl, mask); |
3fdbd1ce | 370 | |
ccb1352e JG |
371 | csum_replace2(&nh->check, htons(nh->ttl << 8), htons(new_ttl << 8)); |
372 | nh->ttl = new_ttl; | |
373 | } | |
374 | ||
83d2b9ba JR |
375 | static int set_ipv4(struct sk_buff *skb, struct sw_flow_key *flow_key, |
376 | const struct ovs_key_ipv4 *key, | |
377 | const struct ovs_key_ipv4 *mask) | |
ccb1352e JG |
378 | { |
379 | struct iphdr *nh; | |
83d2b9ba | 380 | __be32 new_addr; |
ccb1352e JG |
381 | int err; |
382 | ||
e2195121 JP |
383 | err = skb_ensure_writable(skb, skb_network_offset(skb) + |
384 | sizeof(struct iphdr)); | |
ccb1352e JG |
385 | if (unlikely(err)) |
386 | return err; | |
387 | ||
388 | nh = ip_hdr(skb); | |
389 | ||
83d2b9ba JR |
390 | /* Setting an IP addresses is typically only a side effect of |
391 | * matching on them in the current userspace implementation, so it | |
392 | * makes sense to check if the value actually changed. | |
393 | */ | |
394 | if (mask->ipv4_src) { | |
395 | new_addr = MASKED(nh->saddr, key->ipv4_src, mask->ipv4_src); | |
ccb1352e | 396 | |
83d2b9ba JR |
397 | if (unlikely(new_addr != nh->saddr)) { |
398 | set_ip_addr(skb, nh, &nh->saddr, new_addr); | |
399 | flow_key->ipv4.addr.src = new_addr; | |
400 | } | |
fff06c36 | 401 | } |
83d2b9ba JR |
402 | if (mask->ipv4_dst) { |
403 | new_addr = MASKED(nh->daddr, key->ipv4_dst, mask->ipv4_dst); | |
ccb1352e | 404 | |
83d2b9ba JR |
405 | if (unlikely(new_addr != nh->daddr)) { |
406 | set_ip_addr(skb, nh, &nh->daddr, new_addr); | |
407 | flow_key->ipv4.addr.dst = new_addr; | |
408 | } | |
fff06c36 | 409 | } |
83d2b9ba JR |
410 | if (mask->ipv4_tos) { |
411 | ipv4_change_dsfield(nh, ~mask->ipv4_tos, key->ipv4_tos); | |
412 | flow_key->ip.tos = nh->tos; | |
413 | } | |
414 | if (mask->ipv4_ttl) { | |
415 | set_ip_ttl(skb, nh, key->ipv4_ttl, mask->ipv4_ttl); | |
416 | flow_key->ip.ttl = nh->ttl; | |
fff06c36 | 417 | } |
ccb1352e JG |
418 | |
419 | return 0; | |
420 | } | |
421 | ||
83d2b9ba JR |
422 | static bool is_ipv6_mask_nonzero(const __be32 addr[4]) |
423 | { | |
424 | return !!(addr[0] | addr[1] | addr[2] | addr[3]); | |
425 | } | |
426 | ||
427 | static int set_ipv6(struct sk_buff *skb, struct sw_flow_key *flow_key, | |
428 | const struct ovs_key_ipv6 *key, | |
429 | const struct ovs_key_ipv6 *mask) | |
3fdbd1ce AA |
430 | { |
431 | struct ipv6hdr *nh; | |
432 | int err; | |
3fdbd1ce | 433 | |
e2195121 JP |
434 | err = skb_ensure_writable(skb, skb_network_offset(skb) + |
435 | sizeof(struct ipv6hdr)); | |
3fdbd1ce AA |
436 | if (unlikely(err)) |
437 | return err; | |
438 | ||
439 | nh = ipv6_hdr(skb); | |
3fdbd1ce | 440 | |
83d2b9ba JR |
441 | /* Setting an IP addresses is typically only a side effect of |
442 | * matching on them in the current userspace implementation, so it | |
443 | * makes sense to check if the value actually changed. | |
444 | */ | |
445 | if (is_ipv6_mask_nonzero(mask->ipv6_src)) { | |
446 | __be32 *saddr = (__be32 *)&nh->saddr; | |
447 | __be32 masked[4]; | |
448 | ||
449 | mask_ipv6_addr(saddr, key->ipv6_src, mask->ipv6_src, masked); | |
450 | ||
451 | if (unlikely(memcmp(saddr, masked, sizeof(masked)))) { | |
452 | set_ipv6_addr(skb, key->ipv6_proto, saddr, masked, | |
453 | true); | |
454 | memcpy(&flow_key->ipv6.addr.src, masked, | |
455 | sizeof(flow_key->ipv6.addr.src)); | |
456 | } | |
457 | } | |
458 | if (is_ipv6_mask_nonzero(mask->ipv6_dst)) { | |
3fdbd1ce AA |
459 | unsigned int offset = 0; |
460 | int flags = IP6_FH_F_SKIP_RH; | |
461 | bool recalc_csum = true; | |
83d2b9ba JR |
462 | __be32 *daddr = (__be32 *)&nh->daddr; |
463 | __be32 masked[4]; | |
464 | ||
465 | mask_ipv6_addr(daddr, key->ipv6_dst, mask->ipv6_dst, masked); | |
466 | ||
467 | if (unlikely(memcmp(daddr, masked, sizeof(masked)))) { | |
468 | if (ipv6_ext_hdr(nh->nexthdr)) | |
469 | recalc_csum = (ipv6_find_hdr(skb, &offset, | |
470 | NEXTHDR_ROUTING, | |
471 | NULL, &flags) | |
472 | != NEXTHDR_ROUTING); | |
473 | ||
474 | set_ipv6_addr(skb, key->ipv6_proto, daddr, masked, | |
475 | recalc_csum); | |
476 | memcpy(&flow_key->ipv6.addr.dst, masked, | |
477 | sizeof(flow_key->ipv6.addr.dst)); | |
478 | } | |
479 | } | |
480 | if (mask->ipv6_tclass) { | |
481 | ipv6_change_dsfield(nh, ~mask->ipv6_tclass, key->ipv6_tclass); | |
482 | flow_key->ip.tos = ipv6_get_dsfield(nh); | |
483 | } | |
484 | if (mask->ipv6_label) { | |
485 | set_ipv6_fl(nh, ntohl(key->ipv6_label), | |
486 | ntohl(mask->ipv6_label)); | |
487 | flow_key->ipv6.label = | |
488 | *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); | |
489 | } | |
490 | if (mask->ipv6_hlimit) { | |
491 | SET_MASKED(nh->hop_limit, key->ipv6_hlimit, mask->ipv6_hlimit); | |
492 | flow_key->ip.ttl = nh->hop_limit; | |
3fdbd1ce | 493 | } |
3fdbd1ce AA |
494 | return 0; |
495 | } | |
496 | ||
e2195121 | 497 | /* Must follow skb_ensure_writable() since that can move the skb data. */ |
ccb1352e | 498 | static void set_tp_port(struct sk_buff *skb, __be16 *port, |
83d2b9ba | 499 | __be16 new_port, __sum16 *check) |
ccb1352e | 500 | { |
4b048d6d | 501 | inet_proto_csum_replace2(check, skb, *port, new_port, false); |
ccb1352e | 502 | *port = new_port; |
81e5d41d JG |
503 | } |
504 | ||
83d2b9ba JR |
505 | static int set_udp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
506 | const struct ovs_key_udp *key, | |
507 | const struct ovs_key_udp *mask) | |
ccb1352e JG |
508 | { |
509 | struct udphdr *uh; | |
83d2b9ba | 510 | __be16 src, dst; |
ccb1352e JG |
511 | int err; |
512 | ||
e2195121 JP |
513 | err = skb_ensure_writable(skb, skb_transport_offset(skb) + |
514 | sizeof(struct udphdr)); | |
ccb1352e JG |
515 | if (unlikely(err)) |
516 | return err; | |
517 | ||
518 | uh = udp_hdr(skb); | |
83d2b9ba JR |
519 | /* Either of the masks is non-zero, so do not bother checking them. */ |
520 | src = MASKED(uh->source, key->udp_src, mask->udp_src); | |
521 | dst = MASKED(uh->dest, key->udp_dst, mask->udp_dst); | |
ccb1352e | 522 | |
83d2b9ba JR |
523 | if (uh->check && skb->ip_summed != CHECKSUM_PARTIAL) { |
524 | if (likely(src != uh->source)) { | |
525 | set_tp_port(skb, &uh->source, src, &uh->check); | |
526 | flow_key->tp.src = src; | |
527 | } | |
528 | if (likely(dst != uh->dest)) { | |
529 | set_tp_port(skb, &uh->dest, dst, &uh->check); | |
530 | flow_key->tp.dst = dst; | |
531 | } | |
532 | ||
533 | if (unlikely(!uh->check)) | |
534 | uh->check = CSUM_MANGLED_0; | |
535 | } else { | |
536 | uh->source = src; | |
537 | uh->dest = dst; | |
538 | flow_key->tp.src = src; | |
539 | flow_key->tp.dst = dst; | |
fff06c36 | 540 | } |
ccb1352e | 541 | |
83d2b9ba JR |
542 | skb_clear_hash(skb); |
543 | ||
ccb1352e JG |
544 | return 0; |
545 | } | |
546 | ||
83d2b9ba JR |
547 | static int set_tcp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
548 | const struct ovs_key_tcp *key, | |
549 | const struct ovs_key_tcp *mask) | |
ccb1352e JG |
550 | { |
551 | struct tcphdr *th; | |
83d2b9ba | 552 | __be16 src, dst; |
ccb1352e JG |
553 | int err; |
554 | ||
e2195121 JP |
555 | err = skb_ensure_writable(skb, skb_transport_offset(skb) + |
556 | sizeof(struct tcphdr)); | |
ccb1352e JG |
557 | if (unlikely(err)) |
558 | return err; | |
559 | ||
560 | th = tcp_hdr(skb); | |
83d2b9ba JR |
561 | src = MASKED(th->source, key->tcp_src, mask->tcp_src); |
562 | if (likely(src != th->source)) { | |
563 | set_tp_port(skb, &th->source, src, &th->check); | |
564 | flow_key->tp.src = src; | |
fff06c36 | 565 | } |
83d2b9ba JR |
566 | dst = MASKED(th->dest, key->tcp_dst, mask->tcp_dst); |
567 | if (likely(dst != th->dest)) { | |
568 | set_tp_port(skb, &th->dest, dst, &th->check); | |
569 | flow_key->tp.dst = dst; | |
fff06c36 | 570 | } |
83d2b9ba | 571 | skb_clear_hash(skb); |
ccb1352e JG |
572 | |
573 | return 0; | |
574 | } | |
575 | ||
83d2b9ba JR |
576 | static int set_sctp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
577 | const struct ovs_key_sctp *key, | |
578 | const struct ovs_key_sctp *mask) | |
a175a723 | 579 | { |
83d2b9ba | 580 | unsigned int sctphoff = skb_transport_offset(skb); |
a175a723 | 581 | struct sctphdr *sh; |
83d2b9ba | 582 | __le32 old_correct_csum, new_csum, old_csum; |
a175a723 | 583 | int err; |
a175a723 | 584 | |
e2195121 | 585 | err = skb_ensure_writable(skb, sctphoff + sizeof(struct sctphdr)); |
a175a723 JS |
586 | if (unlikely(err)) |
587 | return err; | |
588 | ||
589 | sh = sctp_hdr(skb); | |
83d2b9ba JR |
590 | old_csum = sh->checksum; |
591 | old_correct_csum = sctp_compute_cksum(skb, sctphoff); | |
a175a723 | 592 | |
83d2b9ba JR |
593 | sh->source = MASKED(sh->source, key->sctp_src, mask->sctp_src); |
594 | sh->dest = MASKED(sh->dest, key->sctp_dst, mask->sctp_dst); | |
a175a723 | 595 | |
83d2b9ba | 596 | new_csum = sctp_compute_cksum(skb, sctphoff); |
a175a723 | 597 | |
83d2b9ba JR |
598 | /* Carry any checksum errors through. */ |
599 | sh->checksum = old_csum ^ old_correct_csum ^ new_csum; | |
a175a723 | 600 | |
83d2b9ba JR |
601 | skb_clear_hash(skb); |
602 | flow_key->tp.src = sh->source; | |
603 | flow_key->tp.dst = sh->dest; | |
a175a723 JS |
604 | |
605 | return 0; | |
606 | } | |
607 | ||
738967b8 | 608 | static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port) |
ccb1352e | 609 | { |
738967b8 | 610 | struct vport *vport = ovs_vport_rcu(dp, out_port); |
ccb1352e | 611 | |
738967b8 AZ |
612 | if (likely(vport)) |
613 | ovs_vport_send(vport, skb); | |
614 | else | |
ccb1352e | 615 | kfree_skb(skb); |
ccb1352e JG |
616 | } |
617 | ||
618 | static int output_userspace(struct datapath *dp, struct sk_buff *skb, | |
ccea7445 NM |
619 | struct sw_flow_key *key, const struct nlattr *attr, |
620 | const struct nlattr *actions, int actions_len) | |
ccb1352e | 621 | { |
1d8fff90 | 622 | struct ip_tunnel_info info; |
ccb1352e JG |
623 | struct dp_upcall_info upcall; |
624 | const struct nlattr *a; | |
625 | int rem; | |
626 | ||
ccea7445 | 627 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 628 | upcall.cmd = OVS_PACKET_CMD_ACTION; |
ccb1352e JG |
629 | |
630 | for (a = nla_data(attr), rem = nla_len(attr); rem > 0; | |
631 | a = nla_next(a, &rem)) { | |
632 | switch (nla_type(a)) { | |
633 | case OVS_USERSPACE_ATTR_USERDATA: | |
634 | upcall.userdata = a; | |
635 | break; | |
636 | ||
637 | case OVS_USERSPACE_ATTR_PID: | |
15e47304 | 638 | upcall.portid = nla_get_u32(a); |
ccb1352e | 639 | break; |
8f0aad6f WZ |
640 | |
641 | case OVS_USERSPACE_ATTR_EGRESS_TUN_PORT: { | |
642 | /* Get out tunnel info. */ | |
643 | struct vport *vport; | |
644 | ||
645 | vport = ovs_vport_rcu(dp, nla_get_u32(a)); | |
646 | if (vport) { | |
647 | int err; | |
648 | ||
649 | err = ovs_vport_get_egress_tun_info(vport, skb, | |
650 | &info); | |
651 | if (!err) | |
652 | upcall.egress_tun_info = &info; | |
653 | } | |
654 | break; | |
ccb1352e | 655 | } |
8f0aad6f | 656 | |
ccea7445 NM |
657 | case OVS_USERSPACE_ATTR_ACTIONS: { |
658 | /* Include actions. */ | |
659 | upcall.actions = actions; | |
660 | upcall.actions_len = actions_len; | |
661 | break; | |
662 | } | |
663 | ||
8f0aad6f | 664 | } /* End of switch. */ |
ccb1352e JG |
665 | } |
666 | ||
e8eedb85 | 667 | return ovs_dp_upcall(dp, skb, key, &upcall); |
ccb1352e JG |
668 | } |
669 | ||
670 | static int sample(struct datapath *dp, struct sk_buff *skb, | |
ccea7445 NM |
671 | struct sw_flow_key *key, const struct nlattr *attr, |
672 | const struct nlattr *actions, int actions_len) | |
ccb1352e JG |
673 | { |
674 | const struct nlattr *acts_list = NULL; | |
675 | const struct nlattr *a; | |
676 | int rem; | |
677 | ||
678 | for (a = nla_data(attr), rem = nla_len(attr); rem > 0; | |
679 | a = nla_next(a, &rem)) { | |
e05176a3 WZ |
680 | u32 probability; |
681 | ||
ccb1352e JG |
682 | switch (nla_type(a)) { |
683 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
e05176a3 WZ |
684 | probability = nla_get_u32(a); |
685 | if (!probability || prandom_u32() > probability) | |
ccb1352e JG |
686 | return 0; |
687 | break; | |
688 | ||
689 | case OVS_SAMPLE_ATTR_ACTIONS: | |
690 | acts_list = a; | |
691 | break; | |
692 | } | |
693 | } | |
694 | ||
651887b0 SH |
695 | rem = nla_len(acts_list); |
696 | a = nla_data(acts_list); | |
697 | ||
32ae87ff AZ |
698 | /* Actions list is empty, do nothing */ |
699 | if (unlikely(!rem)) | |
700 | return 0; | |
651887b0 | 701 | |
32ae87ff AZ |
702 | /* The only known usage of sample action is having a single user-space |
703 | * action. Treat this usage as a special case. | |
704 | * The output_userspace() should clone the skb to be sent to the | |
705 | * user space. This skb will be consumed by its caller. | |
651887b0 | 706 | */ |
32ae87ff | 707 | if (likely(nla_type(a) == OVS_ACTION_ATTR_USERSPACE && |
941d8ebc | 708 | nla_is_last(a, rem))) |
ccea7445 | 709 | return output_userspace(dp, skb, key, a, actions, actions_len); |
32ae87ff AZ |
710 | |
711 | skb = skb_clone(skb, GFP_ATOMIC); | |
712 | if (!skb) | |
713 | /* Skip the sample action when out of memory. */ | |
714 | return 0; | |
715 | ||
971427f3 AZ |
716 | if (!add_deferred_actions(skb, key, a)) { |
717 | if (net_ratelimit()) | |
718 | pr_warn("%s: deferred actions limit reached, dropping sample action\n", | |
719 | ovs_dp_name(dp)); | |
720 | ||
721 | kfree_skb(skb); | |
722 | } | |
723 | return 0; | |
724 | } | |
725 | ||
726 | static void execute_hash(struct sk_buff *skb, struct sw_flow_key *key, | |
727 | const struct nlattr *attr) | |
728 | { | |
729 | struct ovs_action_hash *hash_act = nla_data(attr); | |
730 | u32 hash = 0; | |
731 | ||
732 | /* OVS_HASH_ALG_L4 is the only possible hash algorithm. */ | |
733 | hash = skb_get_hash(skb); | |
734 | hash = jhash_1word(hash, hash_act->hash_basis); | |
735 | if (!hash) | |
736 | hash = 0x1; | |
737 | ||
738 | key->ovs_flow_hash = hash; | |
ccb1352e JG |
739 | } |
740 | ||
83d2b9ba JR |
741 | static int execute_set_action(struct sk_buff *skb, |
742 | struct sw_flow_key *flow_key, | |
743 | const struct nlattr *a) | |
744 | { | |
745 | /* Only tunnel set execution is supported without a mask. */ | |
746 | if (nla_type(a) == OVS_KEY_ATTR_TUNNEL_INFO) { | |
34ae932a TG |
747 | struct ovs_tunnel_info *tun = nla_data(a); |
748 | ||
749 | skb_dst_drop(skb); | |
750 | dst_hold((struct dst_entry *)tun->tun_dst); | |
751 | skb_dst_set(skb, (struct dst_entry *)tun->tun_dst); | |
752 | ||
753 | /* FIXME: Remove when all vports have been converted */ | |
754 | OVS_CB(skb)->egress_tun_info = &tun->tun_dst->u.tun_info; | |
755 | ||
83d2b9ba JR |
756 | return 0; |
757 | } | |
758 | ||
759 | return -EINVAL; | |
760 | } | |
761 | ||
762 | /* Mask is at the midpoint of the data. */ | |
763 | #define get_mask(a, type) ((const type)nla_data(a) + 1) | |
764 | ||
765 | static int execute_masked_set_action(struct sk_buff *skb, | |
766 | struct sw_flow_key *flow_key, | |
767 | const struct nlattr *a) | |
ccb1352e JG |
768 | { |
769 | int err = 0; | |
770 | ||
83d2b9ba | 771 | switch (nla_type(a)) { |
ccb1352e | 772 | case OVS_KEY_ATTR_PRIORITY: |
83d2b9ba JR |
773 | SET_MASKED(skb->priority, nla_get_u32(a), *get_mask(a, u32 *)); |
774 | flow_key->phy.priority = skb->priority; | |
ccb1352e JG |
775 | break; |
776 | ||
39c7caeb | 777 | case OVS_KEY_ATTR_SKB_MARK: |
83d2b9ba JR |
778 | SET_MASKED(skb->mark, nla_get_u32(a), *get_mask(a, u32 *)); |
779 | flow_key->phy.skb_mark = skb->mark; | |
39c7caeb AA |
780 | break; |
781 | ||
f0b128c1 | 782 | case OVS_KEY_ATTR_TUNNEL_INFO: |
83d2b9ba JR |
783 | /* Masked data not supported for tunnel. */ |
784 | err = -EINVAL; | |
7d5437c7 PS |
785 | break; |
786 | ||
ccb1352e | 787 | case OVS_KEY_ATTR_ETHERNET: |
83d2b9ba JR |
788 | err = set_eth_addr(skb, flow_key, nla_data(a), |
789 | get_mask(a, struct ovs_key_ethernet *)); | |
ccb1352e JG |
790 | break; |
791 | ||
792 | case OVS_KEY_ATTR_IPV4: | |
83d2b9ba JR |
793 | err = set_ipv4(skb, flow_key, nla_data(a), |
794 | get_mask(a, struct ovs_key_ipv4 *)); | |
ccb1352e JG |
795 | break; |
796 | ||
3fdbd1ce | 797 | case OVS_KEY_ATTR_IPV6: |
83d2b9ba JR |
798 | err = set_ipv6(skb, flow_key, nla_data(a), |
799 | get_mask(a, struct ovs_key_ipv6 *)); | |
3fdbd1ce AA |
800 | break; |
801 | ||
ccb1352e | 802 | case OVS_KEY_ATTR_TCP: |
83d2b9ba JR |
803 | err = set_tcp(skb, flow_key, nla_data(a), |
804 | get_mask(a, struct ovs_key_tcp *)); | |
ccb1352e JG |
805 | break; |
806 | ||
807 | case OVS_KEY_ATTR_UDP: | |
83d2b9ba JR |
808 | err = set_udp(skb, flow_key, nla_data(a), |
809 | get_mask(a, struct ovs_key_udp *)); | |
ccb1352e | 810 | break; |
a175a723 JS |
811 | |
812 | case OVS_KEY_ATTR_SCTP: | |
83d2b9ba JR |
813 | err = set_sctp(skb, flow_key, nla_data(a), |
814 | get_mask(a, struct ovs_key_sctp *)); | |
a175a723 | 815 | break; |
25cd9ba0 SH |
816 | |
817 | case OVS_KEY_ATTR_MPLS: | |
83d2b9ba JR |
818 | err = set_mpls(skb, flow_key, nla_data(a), get_mask(a, |
819 | __be32 *)); | |
25cd9ba0 | 820 | break; |
ccb1352e JG |
821 | } |
822 | ||
823 | return err; | |
824 | } | |
825 | ||
971427f3 AZ |
826 | static int execute_recirc(struct datapath *dp, struct sk_buff *skb, |
827 | struct sw_flow_key *key, | |
828 | const struct nlattr *a, int rem) | |
829 | { | |
830 | struct deferred_action *da; | |
971427f3 | 831 | |
fff06c36 PS |
832 | if (!is_flow_key_valid(key)) { |
833 | int err; | |
834 | ||
835 | err = ovs_flow_key_update(skb, key); | |
836 | if (err) | |
837 | return err; | |
838 | } | |
839 | BUG_ON(!is_flow_key_valid(key)); | |
971427f3 | 840 | |
941d8ebc | 841 | if (!nla_is_last(a, rem)) { |
971427f3 AZ |
842 | /* Recirc action is the not the last action |
843 | * of the action list, need to clone the skb. | |
844 | */ | |
845 | skb = skb_clone(skb, GFP_ATOMIC); | |
846 | ||
847 | /* Skip the recirc action when out of memory, but | |
848 | * continue on with the rest of the action list. | |
849 | */ | |
850 | if (!skb) | |
851 | return 0; | |
852 | } | |
853 | ||
854 | da = add_deferred_actions(skb, key, NULL); | |
855 | if (da) { | |
856 | da->pkt_key.recirc_id = nla_get_u32(a); | |
857 | } else { | |
858 | kfree_skb(skb); | |
859 | ||
860 | if (net_ratelimit()) | |
861 | pr_warn("%s: deferred action limit reached, drop recirc action\n", | |
862 | ovs_dp_name(dp)); | |
863 | } | |
864 | ||
865 | return 0; | |
866 | } | |
867 | ||
ccb1352e JG |
868 | /* Execute a list of actions against 'skb'. */ |
869 | static int do_execute_actions(struct datapath *dp, struct sk_buff *skb, | |
2ff3e4e4 | 870 | struct sw_flow_key *key, |
651887b0 | 871 | const struct nlattr *attr, int len) |
ccb1352e JG |
872 | { |
873 | /* Every output action needs a separate clone of 'skb', but the common | |
874 | * case is just a single output action, so that doing a clone and | |
875 | * then freeing the original skbuff is wasteful. So the following code | |
fff06c36 PS |
876 | * is slightly obscure just to avoid that. |
877 | */ | |
ccb1352e JG |
878 | int prev_port = -1; |
879 | const struct nlattr *a; | |
880 | int rem; | |
881 | ||
882 | for (a = attr, rem = len; rem > 0; | |
883 | a = nla_next(a, &rem)) { | |
884 | int err = 0; | |
885 | ||
738967b8 AZ |
886 | if (unlikely(prev_port != -1)) { |
887 | struct sk_buff *out_skb = skb_clone(skb, GFP_ATOMIC); | |
888 | ||
889 | if (out_skb) | |
890 | do_output(dp, out_skb, prev_port); | |
891 | ||
ccb1352e JG |
892 | prev_port = -1; |
893 | } | |
894 | ||
895 | switch (nla_type(a)) { | |
896 | case OVS_ACTION_ATTR_OUTPUT: | |
897 | prev_port = nla_get_u32(a); | |
898 | break; | |
899 | ||
900 | case OVS_ACTION_ATTR_USERSPACE: | |
ccea7445 | 901 | output_userspace(dp, skb, key, a, attr, len); |
ccb1352e JG |
902 | break; |
903 | ||
971427f3 AZ |
904 | case OVS_ACTION_ATTR_HASH: |
905 | execute_hash(skb, key, a); | |
906 | break; | |
907 | ||
25cd9ba0 | 908 | case OVS_ACTION_ATTR_PUSH_MPLS: |
fff06c36 | 909 | err = push_mpls(skb, key, nla_data(a)); |
25cd9ba0 SH |
910 | break; |
911 | ||
912 | case OVS_ACTION_ATTR_POP_MPLS: | |
fff06c36 | 913 | err = pop_mpls(skb, key, nla_get_be16(a)); |
25cd9ba0 SH |
914 | break; |
915 | ||
ccb1352e | 916 | case OVS_ACTION_ATTR_PUSH_VLAN: |
fff06c36 | 917 | err = push_vlan(skb, key, nla_data(a)); |
ccb1352e JG |
918 | break; |
919 | ||
920 | case OVS_ACTION_ATTR_POP_VLAN: | |
fff06c36 | 921 | err = pop_vlan(skb, key); |
ccb1352e JG |
922 | break; |
923 | ||
971427f3 AZ |
924 | case OVS_ACTION_ATTR_RECIRC: |
925 | err = execute_recirc(dp, skb, key, a, rem); | |
941d8ebc | 926 | if (nla_is_last(a, rem)) { |
971427f3 AZ |
927 | /* If this is the last action, the skb has |
928 | * been consumed or freed. | |
929 | * Return immediately. | |
930 | */ | |
931 | return err; | |
932 | } | |
933 | break; | |
934 | ||
ccb1352e | 935 | case OVS_ACTION_ATTR_SET: |
fff06c36 | 936 | err = execute_set_action(skb, key, nla_data(a)); |
ccb1352e JG |
937 | break; |
938 | ||
83d2b9ba JR |
939 | case OVS_ACTION_ATTR_SET_MASKED: |
940 | case OVS_ACTION_ATTR_SET_TO_MASKED: | |
941 | err = execute_masked_set_action(skb, key, nla_data(a)); | |
942 | break; | |
943 | ||
ccb1352e | 944 | case OVS_ACTION_ATTR_SAMPLE: |
ccea7445 | 945 | err = sample(dp, skb, key, a, attr, len); |
ccb1352e JG |
946 | break; |
947 | } | |
948 | ||
949 | if (unlikely(err)) { | |
950 | kfree_skb(skb); | |
951 | return err; | |
952 | } | |
953 | } | |
954 | ||
651887b0 | 955 | if (prev_port != -1) |
ccb1352e | 956 | do_output(dp, skb, prev_port); |
651887b0 | 957 | else |
ccb1352e JG |
958 | consume_skb(skb); |
959 | ||
960 | return 0; | |
961 | } | |
962 | ||
971427f3 AZ |
963 | static void process_deferred_actions(struct datapath *dp) |
964 | { | |
965 | struct action_fifo *fifo = this_cpu_ptr(action_fifos); | |
966 | ||
967 | /* Do not touch the FIFO in case there is no deferred actions. */ | |
968 | if (action_fifo_is_empty(fifo)) | |
969 | return; | |
970 | ||
971 | /* Finishing executing all deferred actions. */ | |
972 | do { | |
973 | struct deferred_action *da = action_fifo_get(fifo); | |
974 | struct sk_buff *skb = da->skb; | |
975 | struct sw_flow_key *key = &da->pkt_key; | |
976 | const struct nlattr *actions = da->actions; | |
977 | ||
978 | if (actions) | |
979 | do_execute_actions(dp, skb, key, actions, | |
980 | nla_len(actions)); | |
981 | else | |
982 | ovs_dp_process_packet(skb, key); | |
983 | } while (!action_fifo_is_empty(fifo)); | |
984 | ||
985 | /* Reset FIFO for the next packet. */ | |
986 | action_fifo_init(fifo); | |
987 | } | |
988 | ||
ccb1352e | 989 | /* Execute a list of actions against 'skb'. */ |
2ff3e4e4 | 990 | int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb, |
12eb18f7 TG |
991 | const struct sw_flow_actions *acts, |
992 | struct sw_flow_key *key) | |
ccb1352e | 993 | { |
971427f3 | 994 | int level = this_cpu_read(exec_actions_level); |
971427f3 AZ |
995 | int err; |
996 | ||
971427f3 | 997 | this_cpu_inc(exec_actions_level); |
f0b128c1 | 998 | OVS_CB(skb)->egress_tun_info = NULL; |
971427f3 AZ |
999 | err = do_execute_actions(dp, skb, key, |
1000 | acts->actions, acts->actions_len); | |
1001 | ||
1002 | if (!level) | |
1003 | process_deferred_actions(dp); | |
1004 | ||
1005 | this_cpu_dec(exec_actions_level); | |
1006 | return err; | |
1007 | } | |
1008 | ||
1009 | int action_fifos_init(void) | |
1010 | { | |
1011 | action_fifos = alloc_percpu(struct action_fifo); | |
1012 | if (!action_fifos) | |
1013 | return -ENOMEM; | |
ccb1352e | 1014 | |
971427f3 AZ |
1015 | return 0; |
1016 | } | |
1017 | ||
1018 | void action_fifos_exit(void) | |
1019 | { | |
1020 | free_percpu(action_fifos); | |
ccb1352e | 1021 | } |